Coal-drill.



No. 762,863. PATENTE'D JUNE 14', 1904.

. G. F.,WEISS.

GOAL DRILL. APPLICATION FILED JUNE 27. 1901. RENEWED NOV. 23. 1903.

N0 MODEL.

WE nor-ms PETEIS co, morouma, WASNINGTDN u c Iva-762,863.

UNITED STATES Patented Jane 14, 1904.

GEORGE F. WEISS, OF SPRINGFIELD, ILLINOIS.

SPECIFICATION forming part of Letters Patent No. 762,863, dated June 14,1904.

COAL-DRILL.

Application filed June 27, 1901. Renewed November 23, 1903. Serial No.182,406. (110 model.)

To all whom it may concern.-

Be it known that I, Gnonen F. sles, of the city of Springfield, countyof Sangamon, and State of Illinois, have invented a certain new anduseful Coal-Drill, of which the following is a specification.

This invention provides superior means for rotating and feeding a spiraldrill-shaft; and it is particularly adapted to permit rapid withdrawalof the shaft.

The invention is exemplified in the structure hereinafter described, andit-is defined in the appended claims.

In the drawings forming'part of this specification, Figure 1 is arepresentation of a drill embodying my invention, the operative partsbeing concealed by the casing. Fig. 2 represents the operative parts ofthe drill mechanism in section, the handle being removed from thedriveshaft and the drill-shaft being omitted. Figs. 2 and 3 are detailson line as in Fig. 1 of the means employed to permit rapid withdrawal ofthe drill-shaft. Fig. 4 is also a detail on line as of Fig. 1, showingclutch in different position.

The drill-shaft 1 has key as 2, cut into its perimeter lengthwise of itsaxis, and it is regularly spiral. A sleeve fits loosely on thedrill-shaft, and it has a pair ofseats or grooves,

internal longitudinal ribs or splines, as 13,.

which engage the grooves 2 of the drill-shaft. The sleeve 12 has agear-wheel ll beveled to mesh with the beveled pinion 10, and a shaft 9,journaled at right angles with the axis of the sleeve, carries thepinion and is retated by a crank-handle 8. A sleeve 24 abuts againstsleeve 12 or terminates in the vicinity thereof, and such sleeve has apair of oblique wings, as which Wings engage the spiral shaft after themanner of the threads of a nut. A spur-wheel 14 is attached to the endof sleeve 12 adjacent to sleeve 24, the connection being preferably madethrough a rib 15, which engages a slot in the end of the sleeve andforms a part of spur-wheel 14. In practice there are two ribs 15 and twoslots in the sleeve; but it is inconvenient to show more than one in thedrawings. A spur-wheel 23 is formed on the end of sleeve 24 adjacent tosleeve 12. A coun- 25, on its inner surface,-

ter-shaft 18 is A journaled parallel with the sleeves 12 and 24 somedistance therefrom, and spur-pinions 16 and 19 are mounted on thecounter-shaft and mesh one with wheel 14 and the other with wheel 23.Pinion 16 is attached to the counter-shaft, and it has clutchprojections 17 on its face adjacent to pinion 19. The pinion 19 isslidable lengthwise of the counter-shaft, and it has clutch-lugs 20 onits face adjacent to pinion 16. A flange 21 is formed on the end of ahub extension of pinion 19, thus producing an annular groove in which ashifter-fork 22 rides. The shifter=fork has a rounded and threaded end22, which extends through a slot 4 of easing 4, and a wingnut 22 isscrewed onto the threaded end 22 outside the casing to position. Whenthe shifter-fork is set in the position shown in Fig. 3, the clutchprojections 20 ofpinion 19 will engage the clutch projections 17 ofpinion 16, and the two pinions will rotate together. VVhentheshifterfork is set in the position shown in Fig. 4, the clutchprojections are out of engagement and the pinions may each rotateindependent of the other.

The gearing is so speeded that the sleeve 24 will move slightly slowerthan sleeve 12, and

' this is preferably accomplished by giving pin- 8 ions 16 and 19 thesame number of teeth an providing wheel 23 with one more tooth thanwheel 14 has.

When the pinions 16 and 19 are in clutch and the crank-arm 8 is rotated,motion is imparted to sleeve 12 through pinion 10 and wheel 11, and theribs or splines 13 of the sleeve 12 give rotary motion to the spiraldrillshaft. The gear-wheel14 rotates with sleeve 12 and drives pinion16. Pinion 19 receives motion from pinion 16 through the clutchprojectionsfand it imparts motion to gearwheel 23 at a slightly-reducedspeed, as compared with the speed of gear-wheel14. As the shaft rotateswith sleeve 12 its speed is somewhat greater than that of sleeve 24, andso the shaft is gradually forced lengthwise through the sleeves by theinclined-plane action of the retarded wings of sleeve 24.

When the shaft 1 has been forced into the coal a required distance, thepinions 16 and 19 hold the shifter-fork in are thrown out of clutch, asshown in Fig. 4, and the shaft is withdrawn by a backward pull applieddirectly to the shaft. As the shaft is Withdrawn the sleeve 24 andpinion 19 are turned by the inclined-plane action of the spiral on thewings 25; but the other gearing remains stationary.

The working mechanism is suitably incased, and the casing providesjournals for the rotating bearings. The sleeve 24 journals in the part 3of the casing, a lateral extension 4 of easing 8 forms a housing forpinions 1'6 and 19, the part 5 of the casings provides a journal forsleeve 12, and the drive-shaft 9 journals in abox 7 attached to a plate6. The part 3 4 of the casing is on one side of plate 6, part 5 is onthe other side of the plate, and the two parts are secured together andto the plate by bolts passing through suitable lugs. The sleeve 12extends through plate 6 to engage wheel 14, the counter-shaft 18journals at one end in the plate, and when the parts of the casing areseparated from the plate all the moving parts are accessible anddetachable.

I claim 1. In driving mechanism for coal-drills the combination with aspiral drill-shaft having longitudinal grooves, of a sleevehavinginternal ribs to engage the grooves, asleeve having inclined wingsto bear against the spiral surfaces of the shaft, gear-wheels on thesleeves, a counter-shaft, parallel with the drill-shaft, a pair ofpinions on the counter-shaft meshing one with each of the gear-wheels ofthe sleeves, and means for connecting and disconnecting the pinions,substantially as described.

2. In mechanism for driving coal-drills, the combination with a spiraldrill-shaft having longitudinal grooves, of a sleeve having internalribs to engage the grooves of the shaft, a

sleeve having inclined wings to bear against the spiral surfaces of theshaft, gear-wheels on the sleeves, a counter-shaft parallel with thedrill-shaft, a gear-pinion fixed on the driveshaft in mesh with thewheel of one of the sleeves, such pinion having a clutch-face, agear-pinion mounted slidably on the countershaft in mesh with the wheelof the other sleeve, clutch projections on the slidable pinion adaptedto engage the clutch-face of the relatively fixed pinion, means forshifting the slidable pinion to throw itin and out of clutch and meansfor imparting rotary motion to the sleeve having the ribs, substantiallyas described.

3. In mechanism for driving coal-drills, the combination with a spiraldrill-shaft having longitudinal grooves, of a sleeve having ribs adaptedto engage the grooves of the drillshaft such sleeve being slotted at oneend, a bevel gear-Wheel on the ribbed sleeve, a driveshaft at rightangles With the ribbed sleeve, a pinion on the drive-shaft meshing withthe beveled gear-Wheel of the sleeve, a spur-Wheel fitting over theslotted end of the ribbed sleeve and having internal lugs to engage theslots thereof, a sleeve having wings to engage the spiral surfaces ofthe drill-shaft, a spur-wheel on the Winged sleeve, a train of gearingconnecting the spur-wheel on the ribbed sleeve with the spur-wheel onthe Winged sleeve and a clutch in the train of gearing, substantially asdescribed.

In testimony whereof I sign my name in the presence of two subscribingwitnesses.

eEo. F. WEISS.

